Boiler



April 8, 1930.

G. Y. BONUS BOILER Filed June 15, 1925 O0 coca ecanecdc oobo 0O 0O 0O OO O 00 00/00 00 O HEEHEEEHE Fml.

Patented Apr. 8, 1930 v UNITED STATES PATENT OFFICE 1 a GEORGE Y. BONUS, OF 'GHICAGO, ILLINOIS,'ASSIGNOR TO ERIE CITY IRON WORKS, OF

ERIE, PENNSYLVANIA, .A CORPORATION OF PENNSYLVANIA BOILER Application filed June, 15, 1925. Serial No. 37,126.

This invention relates particularly to steam bollershaving at least two upper drums in the plane of the water level and-connected in circuit with each other and at least one '5 lower drum, the invention being exemplified in what is known as a three drum boiler.

The present invention is designed to improve the performance of a boiler of this 2 flow, from the rear drum, this result being" furthered by carrying the feed water into said rear drum. Other features and details of the invention will appear more fully from the specification and claims. I

The invention is illustrated in the accompanying. drawings as follows boiler on the line 11 in Fig. 2. 1

Fig. 2 a section on the line 22in Fig. 1.

1 marks the front drum, 2 the lower drum and 3 the rear drum. As indicated the upper drumsare in the plane of the water level, each having a steam space and a water space. The front drum is connected with the lower drum s'oiby a bank of tubes 4, '4 and 4 The rear drum is connected with the lower drum by a bank of tubes 5 and 5*. The upper drums are connected by-water tubes 6. Steam tubes 7 also connect the drums 1 and 2. Steamtubes 8 extend from the rear drum 3 to a chamber 9, this chamber being preferably formed in the upper part of the drum 1 and a steam' discharge pipe 10 leads from the boiler.

49 Feed water is delivered preferably to the rear drum 3 by way of a pipe 11.

A furnace chamber 12 has surrounding walls enclosing the entire boiler and a top wall 13. A baffle plate 14 is arranged be tween the tubes 4* and 40f the front bank of tubes and a bridge wall 15 extends directly below the bafile plate 14. The baflle 14 and bridge wall, the front and side walls of the furnace, form the combustion chamber and the products of combustion pass out from the combustion chamber, over the bafile 14 and are deflected downwardly along the tubes 4 by a baflle 16 which extends from the drum 1 between the tubes 4 and 4 A baffle 17- arranged over the tubes 4 deflect the gases upwardly along the tubes 4 so that the gases pass from the combustion chamber, across 7 the tubes 4 and 4, and downwardly'alo-ng' 'thetubes 4, around the baffle 16 upwardly along the tubes 4 between the baffles 16 and 17. The gases are then carried upwardly by an extension 17 of the baflie 17, across the tubes 6 and are turned by the upper wall 13 thus sweeping the steam tubes. The gases then pass over the upper end of a baffle 20 arranged at the frontside of the tubes 5, thisbafileextending from the lower ends of these tubes, or thebaflle 17, to a point near the upper ends of the tubes; A'jbaflie 21 extends downwardly from the drum 3 between the tubes 5 and 5*. Thus the gases are di- Fig. 1 shows a central section through the.

rected downwardly along the tubes 5 between the baifles'20 and 21 and makea turn at the bottom of the rear bank of tubes passing upwardly to the rear of the baffle 21 and between this baffle and the rear wall. Deflecting baflles 22 extend inwardly from the rear wall and force a flow of gases along or through the tubes. The gases are discharged from the furnace to the stack through an opening 28. This movement oflgases and the transfer of heat cause a very rapid upflow of water through the front bank of tubes, a very rapid cross flow of Water through the water tubes 6, anda down flow of water through the rear bank .of tubes, making a complete uninterrupted circuit. The feed water in the rear drumchilling this water to. a certain extent adds its influence preventing adverse currents in the rear bank of tubes.

. The levelof the water tube 6 relatively to the front and rear drums also tends to accelerate or add to this resultl-in-that when the boiler is steaming the Water level in the front drum through'the rapid evolution of steam and upfiow of water from the tubes is raised quite materiallyabove the level of the water in the rear drum and the water is ordinarily delivered tothe rear drum above the water level'so that theremay be a free separation of steam from the water. This manner of delivering water to the rear drum is of significance in that there is no tendency to cause the throwing upwardly of any masses of water into the steam fiowas is common where the delivery of water isupwardly and from below the water level. Steam carried from the front to the rear drum is also de; 7 livered to the rear drum n a d rection to impinge upon the water of the drum so that which the water and steam. are delivered to the drum, preferably in a direction the reverse of that fromwhich the water and steam arev delivered. This is accomplished in the specific. construction shown by the pipes 8- whiclrlead'from the rear drum back into the front drum in substantially a reverse direction from the delivery of water and steam by 'way of the pipes 6 and 7, in other words,

there is a complete reversal of direction of flow, all the steam leaving the rear drum in a direction the reverse of that from which the steam and water lead to this drum.

Thisconstruction utilizes three of the best known principles for separating solids and liquids from gases, namely, change in velocity, impingement and reversal of flow. The

change of velocity spreads the discharge from I V the tubes delivering the moisture or vapor ladened steam into the rear drum and affords the first opportunity for the steam to lose its entrained moisture and solids; The velocity of thisdischarge intothe rear drum will,

under all circumstances, be great enough to effect an impingement or impact of the moisture or vapor'ladened steam upon the stabilized surface of the water in the rear'drum with such'force that the solids will be driven into the water, and'the small particles of water in the moisture or vapor will be at-. tracted by cohesion to the water in the rear drum. Having freed itself of the entrained moisture or vapor and solids by the change of velocity and impingement the steam is forced to reverse its flow in order to find its way back through the upper bank of tubes in the heated zoneto the steam-tight chamber, or compartment in the front upper drum from which it leaves the boiler through the steam nozzle. This reversal of flow or third principle has a decided tendencyto throw out any of the fine particles of water or solids that may have escaped the action of the change of velocity and impingement heretofore described.

What I claim as new is 1. In a boiler, the combination of a front.

In consequence.

lower drum forming them ain circuit fort-he water; a furnace; and bafiles comprising a plurality of battles operating on the front bank of tubes controlling the application of heatto the tubes compelling an upfiow of water in and throughout the front bank of tubes, a rearward flow of water in and throughout the upper bank of water tubes, I and: a downward fflow of water in and throughout the real-bank of tubes.

2.7 In aboiler, the combination of a front drum; a rear drum, said'idrums being in the plane of the water level;v a lower drum; a

front bankiof tubes connectingthe lower and front drum; a rear bank'of'tubes leading-to the rear drum in circuit between the lower drum and the rear drum; an upper bank of water tubesbetween the front and 'rear drums, saiddrums'and banks of tubes forming an unobstructed ring path from the lower drumto, the front drum, from the frontdrum to the rear drum and from the rear drum to the lower drum forming the main circuit for the watergmeans for delivering-feed water to the rear drum; af urnace; and baffles comprising a plurality of bafiies operating on the front bank of tubes controlling the application of heat'to the tubes compelling an upfiow of water in and throughout the front bankof tubes, a rearward flow of water in and throughout the upper bank of water tubes, and a' downward flow of water in and throughout the rear bank of tubes.

3. Ina boiler, the combination of a front drum; a rear drum, said drums being in the plane of the water level; a lower drum; a

front bank of tubes connecting-the lower andfrontdrum; a rear bank of-tubes leading to the rear drum 1n circuit between the lower drum and" the rear drum; an upper bank of" to the front drum, from the front drum to,

the rear drum and from, the, rear drum to the lower drum forming themain; circuit for the water a-furnace; and bafiies comprising a plurality of bafiles operating on. the front bank of tubes controlling the application of heatto the tubes'compelling an upflow of water in and throughout the front bank of tubes, a. rearward flow of water in and throughout the upper bankof water tubes,

and a downward flow, of water in and throughout the rear bank of tubes, the upper bank of tubes being arranged in the path of the gases.

4. In a boiler, the combination of a front drum; a rear drum, said drums being in the plane of the water level; a lower drum; a front bank of tubes connecting the lower and w front drum; a rear bank of tubes leading to the rear drum in circuit between the lower drum and the rear drum; an upper bank of water tubes between the front and rear drums, said drums and banks of tubes forming an unobstructed ring path from the lower drum to the front drum, from the front drum "to the rear drum and from the rear drum to the lower drum forming the main circuit for the water a bank of steam tubes leading from the front drum to the rear drum; a steam discharge connection leading from the rear drum; a furnace; and baffles comprising a plurality of baffles operating on the front bank of tubes controlling the application of I heat to the tubes compelling an upflow of water in and throughout the front bank of tubes, a rearward flow of water in and throughout the upper bank of water tubes, and a downward flow of water in and throughout the rear bank of tubes.

5. In a boiler, the combination of a front I drum; a rear drum, said drums being in the plane of the water level; a lower drum; a front bank of tubes connecting the lower and front drum; a rear bank of tubes leading to the rear drum in circuit between the lower drum and the rear drum; an upper bank of water tubes between the front and rear drums, saiddrums and banks of tubes forming an unobstructed ring path from the lower drum to the front drum, from the front drum to the rear drum and from the rear drum to the lower drum forming the main circuit for the water; a furnace; and baflies controlling the application of heat to the tubes compelling an upflow of water in and throughout the front bank of tubes, a rearward flow of water in and throughout the upper bank of water tubes, and a downward flow of water in and throughout the rear bank of tubes, said baflies comprising an upward baffle forming the rear of the combustion chamber and terminating below the front drum, a baffle extending downwardly from the front drum in the front bank of tubes and terminating above the lower drum, and a battle extending upwardly from the lower drum and reflecting the gases through the upper bank of tubes;

6. In a boiler, the combination of a front c drum; a rear drum, said drums being in the plane of the water level; a lower drum; a

to the front drum, from the front drum to the rear drum and from the rear drum to the lower drum forming the main circuit for the water; a furnace; and baffles controlling the application of heat to the tubes compelling :an upfiow of water in and throughout the front bank of tubes,'a rearward flow of water in and throughout the upper bank of water tubes, and a downward flow of water in and throughout the rear bank of tubes, said baffies comprising an upward baflle forming the rear of the combustion chamber and terminating below the front drum, a baffle extending downwardly from the front drum in the front bank of tubes and terminating above the lower drum, abafile extending upwardly from the lower drum and deflecting the gases through the upper bank of tubes, and a baffle extending downwardly from the rear drum in the rear bank of tubes. In testimony whereof I have hereunto set my hand. 7 V

GEORGE Y. BONUS. 

